The real instrument: watch the film, answer in your own words, read what comes back.
Short on time: a tunnel under Lake Erie filled with gas. Garrett Morgan went down with a breathing hood he had patented two years earlier and brought men out alive. The next morning's paper didn't mention him. He had shown that hood to five or six fire chiefs. Every one liked it on the telephone. None bought it once he walked through the door.
Answer the way you’d say it to someone on your crew.